Alignment of nucleosomes along DNA and organization of spacer DNA in Drosophila chromatin (original) (raw)
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Institute of Molecular Biology, Academy of Sciences of the USSR
Moscor, USSR
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Institute of Molecular Biology, Academy of Sciences of the USSR
Moscor, USSR
Search for other works by this author on:
,
Institute of Molecular Biology, Academy of Sciences of the USSR
Moscor, USSR
Search for other works by this author on:
,
Institute of Molecular Biology, Academy of Sciences of the USSR
Moscor, USSR
Search for other works by this author on:
Institute of Molecular Biology, Academy of Sciences of the USSR
Moscor, USSR
Search for other works by this author on:
Revision received:
14 June 1982
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V.L. Karpov, S.G. Bavykin, O.V. Preobrazhenskaya, A.V. Belyavsky, A.D. Mirzabekov, Alignment of nucleosomes along DNA and organization of spacer DNA in Drosophila chromatin , Nucleic Acids Research, Volume 10, Issue 14, 24 July 1982, Pages 4321–4337, https://doi.org/10.1093/nar/10.14.4321
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Abstract
A series of mono- and dinucleosomal DNAs characterized by an about ten-base periodicity in the size were revealed in the micrococcal nuclease digests of Drosophila chromatin which have 180-5 base pair (bp) nucleosomal repeat. 20, 30, and 40 bp spacers were found to be predominant in chromatin by trimming DNA in dinucleosmes to the core positian. Among several identified mononucleosmes (MN), MN 170 , MN 180 and MN 190 were isolated from different sources (the figures indicate the DNA length in bp). The presence of the 10, 20, and 30 bp long spacers was shown in these mononucleosomes by experiments. The interaction of histone H3 with the spacer in the Drosohila MN 180 particle was also shown by the crosslinking /5/. We conclude from them results that the 10 n bp long intercore DNA (n=2 , 3 and 4) is organized by histone H3, in particular, and together with the core DNA forms a continuous superhelix. Taken together, these data suggest that Drosphila chromatin consists of the regularly aligned and tightly packed MN 180 , as a repeating unit, containing 10 and 20 bp spacers at the two ends of 180 bp DNA. Within the asymmetric and randomly oriented in chromatin MN 180 , the cores occupy two alternative positions spaced by 10 bp.
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